Stop motion for drawing frames



July 30, 1929. W. J. scoTT i 1,722,769

STOP MOTION FOR DRAWING FRAMES Filed Jan. 5, 1929- sheets-swam 1 IN V EN TOR.

ATTURNEYS. v

July 30,1929.v Jgsw 1,722,169

STOP MOTION FOR DRAWING FRAMES Filed Jan. 5, 1929 2 Sheets-SheaI 2 INVENTOR. Z////fc/ 6100i?.

A TTORNEYS.

Y 'ofthe guide plate with my Patented July 30, 192,9..

UNITED STA WALTER J. sco'r'r,` or WooivsocKE'r, RHODE ISLAND.'

STOP MOTION FOR DRAWING FRAMES'. z

Application led January 5, 1929. Serial No. 330,649.A i

`This invention relates to an electric stop motion for drawing frames and is an improvement on vmy Patent No. 1,701,127, dated Feb. 5, 1929; and the object of the invention is to provide a stop motion of this character having an electric circuit` closer unit which is located intermediate-the sliver supply packages and the draft rolls5 whereby the circuit is afected by the falling of a broken down sliver end upon the circuitclosing member to stop the machine.

A further object of the invention is the provision of an elongated iexible contact member set below the running slivers to extend across their line 'of travel, whereby the weight of any one of a number of such slivers upon breaking will fall upon this liexible nger and move the same tov complete the circuit and energize a magnet to shift the belt or otherwise stop the machine.

With these and other objects in View, the invention consists of certain novel features of construction, as will be more fully described, and particularly pointed out in the appended claims.

In the accompanying drawings:

Fig. 1 is a side elevation showing thev general arrangement of portions of the usual mechanismof a drawing frame with my improved contact` member applied thereto and indicating one of the slivers in dotted'lines as lying uponl the contact finger the weight of which will. move the same to stop the machine. v

Fig. 2 is a detail showing la side elevation improved contact arm as connected to the frame of themachine adj acent this guide plate.

, Fig. 3 is a perspective view ofthe circuitclosing unit which comprises a platemember with a contact arm mounted thereon.

Fig. 4 is a section showing my improved circuit closing unit as mounted on the frame of the machine and secured in position by one of the frame bolts. Y Y Y Fig. 5 is a sectionon line 5-5 of Fig.k 4 thru the bolt where one end of the contact nger is fixed and is insulated from its plate. Fig., 6 Vis a section on line 64--6 of Fig. 4 showing the carbon contact as set in a lead collar inthe Contact carrying plate.

Fig. 7 is a view illustrating the sliver guide plate as located on an angle adjacent'one of the sets of draft rolls andshowing one of the slivers as having broken away and lying against the contact finger and bending the same inwardf'to makea contact and coini plete the circuit to stop the machine.;` i

Fig. 8 isla view illustrating the belt shift lever as retained in operative position against tension of the beltshifting spring to be released by energizing the solenoid magnet when the electric circuitk is closed. Fig. is a diagrammatic view illustrating the wiring diagram inwhich the contactfin'- geris arranged to lclose the circuit-by theA weight of a broken sliver for operating-.the v i' belt-shifting lever.

It found inthe practical operationl of drawing frames of this character that where slivers are led from a pluralityV of supply packages thru a guide plate. to vbe acted upon by a set of drawing lrolls quite often one -or more of these slivers are broken at `apoint intermediate the package ,and the. guide plate and when this occurs theremaining slivers which continue to run naturally form a thin place in the yarn and this defective condition may continue for some time before being discovered bythe operator and to obviate this diiculty, I have Vprovided an automatically operable stopmotion and have mounted' its .circuit closer intermediate the supply packages and the drawingV rolls so that when any one of a set or group of slivers breaksat any point intermediate the supply package and these rolls;k broken end serves to efect-the electricy circuit to stop the machine. w i

f My improved circuit closer is formed in a single unit which may be constructed com# plete and independent ofthe machine and is' adapted to` be readily attached thereto preferably by using one ormore Vof the bolts already in the machine.V i

Thisr circuit closing 'member is provided the falling of the withan elongated contact arm which is set to eXtendacross the line' of travelof the sliver and below the same, whereby theweightof a falling broken sliver will moveA this flexible finger to complete Ythe circuit and stop the machine; and the following is a detailed description ofthe present embodiment of my invention andshowing one means by which these advantageousresults may be accomplished: y

With reference to thev drawing,v 10 designates a plurality of supply packages which may besliver wound Aon spools7 bobbins or the like on which the slivers 11 are wound and from which the .slivers are 'ledthru the slots 12 in the-guide plate 13 thence'over'andaround the back draft rolls 14 thru the carrier rolls 15 and the front rolls 16 and after being drawn out or drafted the yarn is fed thru the flyer 1 7 to be wound upon the s ool or bobbin 18 whichl is raised and lowerec on its spindle 21 thru action of therack 19 .and pinion 20, which spindle and spool 1s rapidly rotated by the whirl 21 thru the belt 22 and pulley 23.

l It is found in practice that the sliver ends often break down at some point between the supply 'package 10 and the guide plate 13 and that when this occurs and the remaining slivers continue to run without breaking down, and without the brokensliver, a thin place in the yarn is formed and when later discov# erednecessitates cutting out and loss of the thin portion, and piecing up the broken ends tion, may extend to,

and starting over again with the required number of ends. Y

To obviate this difficulty, Iy have provided automatic means in the form of van electric stop motion which I attach to the machine the same including a circuit closing unit which comprises a plate 24 of 'suitable length slotted as` at 25, thru which the securing bolt 26, which holds the guide plate 13 in posibind this circuit closing plate in position or any other' means of fasteningA may be employed. Y

One end of this plate is offset as at 26 or raised above the plane of the body portion of the plate to. provide a fixed support for the end 27-of the flexible contact linger 28, this end 2.7 being insulated from the plate by the insulation washers 29 and is bound against the end of the circuit wire 30hy means of the binding screw 31. Y

At. the opposite end of this contact plate, I have drilled a hole at 32 into which is set a lead collar 33. and in this lead collar isset a carbon contact button 34 contactingend 3.5 of this flexible finger 28 is forcedy to. complete the circuit thru the frame 36 back to. the second circuit wire 37 which is'secured to. this frame b a screw 38, by which constructionit will be seen that this circuit-closing unit may be readily attached imposition on the frame by the use of but a single bolt. and that one being preferably one that is.V already used in the machine.

l By employing a carbon plug thru which to make thecircuit, sparking is obviated and by setting it in lead the liability of cracking is minimized.r

Y As. above described, this flexible bendable Hager is supported i-n the plate 24 and-insu'- lated therefrom as shown in Fig. 5, `and is connected to the circuit thru the wire 30, the other Wire of the'circuit 37 being connected tothe han 26.. The sliver guide plate 13 is set at an incline to a horizontal base line, as best illustrated in Fig. 1, whereby when any one of these slivers breaks down 'the broken falls and rests upon this very lthin flexible against which thev finger 28 which extends across the path of the running slivers, whereby the weight of the sliver causes this finger to spring inwardly into cont-act with the car-hon plug 34, thus completing the circuitto energize the electro magnet 38, ltrip thelatch 39 and release the lever 40 which thru the action of spring 41 throws the rod V42 and shifts the belt from the tight pulley 43 to the loose pulley 44 thus stopping the machine. The electric circuit is herein shown as being normally open but to so arrange the finger 28 that its movement will open the circuit instead of closingit, will fall within the spirit and scope'of this in vention.

My improved stopmotion for drawing frames is extremely simple andpr-actical in its construction and oper-ation and by its use much time is save-d and waste ofv goed textile material is prevented, as the moment a sliver is broken the machine'is stoppedwhich immediately gives notice to the operator Who pieces up the corrected the machine is started again.

The foregoing description is directed solely Itowards the construction illustrated,bu t I desire it to be understood that I reserve the privilege of resorting toall the mechanical changes to which the device is susceptible, the invention being defined and limited only by the terms of the appended claims.

' I claim:

1. In an electric stop motion for drawing frames, an electric circuit, a stop motion in said circuit, a set of sliversupply packages, draft rolls, a circuit closing unit comprising a body member, meansfor connecting said member to the machine intermediate the sup` ply package and draft rolls,'a flexible contact finger carried by said body member and arranged to beY actuated by the weight ofany one o f a plurality of broken slivers' to affect the vcircuit and stop theV machine.

2. In an electric stop motion for drawing frames, an electric circuit, a stop motion in said circuit, sliver supply packages, draft rolls, a circuit closing unit comprising a member adaptedtobe readily attached to the drawingV the supplypackagesandiv draft rolls, 'said bodyI member carrying an elongated flexible Contact linger extending across the lineof ends and after the troubleis 4 frame at a point intermediate travel of the slivers to -bemoved bythe weight of any one of a plurali-ty of broken s-livers 'l to close the circuit and stop the 3. In an electric stop motion for 4drawing frames, said frames havingl sliver supply packages and 'draft rolls, ain"electric circuit, a stop motion in the circuit including a circuit closing unit located intermediate said supply packages and draft rolls, said unit comprising a body member connected to said frame and carrying-'a yieldable contact. finger machine.

disposed below at substantially a right angle 'to the line of travel o-f said sliver whereby) a broken silver falling upon the finger moves it to close the circuit and stop the machine.

4. In an electric stop motion for drawing frames having sliver supply packages, draft rolls and a sliver guide plate intermediate said supply packages and draft rolls, an electric circuit, a stop motion in said circuit including a circuit closing unit having an elongated finger ositione-d below said sliver guide and to lie transversely of the line of travel of said slivers in position to be moved by the weight of a broken sliver falling upon it to affect the circuit and stop the machine.

5. In an electric stop motion for drawing frames, said frame having sliver supplyI packages and draft rolls, stop motion in the circuit including a circuitclosing unit located intermediate said supply packages and said draft rolls, said unit comprising a plate connected to said frame, a flexible finger fixed at one end on said plate to extend across and below the line of travel of the slivers, and a contact on said plate at the opposite free end of said finger whereby a broken sliver falling upon the finger will move this free end to complete the circuit and stop the machine.

In testimony whereof I aiiix my signature.

"" WALTER J. SCOTT.

an electric circuit, a. 

